package tcts0421;

import java.util.Stack;

public class 双栈实现队列 {
    Stack<Integer> stack1 = new Stack<>();
    Stack<Integer> stack2 = new Stack<>();
    public void push(int node){
        stack1.push(node);
    }
    public int pop(){
        if(stack2.empty()){
            while(!stack1.empty()){
                stack2.push(stack1.pop());
            }
        }
        return stack2.pop();
    }
}
